Cannot connect to ECM
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Junior Member
Joined: Dec 2003
Posts: 2
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Car: 1984 Firebird T/A
Engine: TPI 5.7L
Transmission: 5-Speed
Cannot connect to ECM
Can someone tell me what I am doing wrong?Please!!!!
I cannot connect to my ECM ALDL!! Let me explain, whenever i use any of the bins available from the (efi-tuning or efi-diy) sites or the stock bin (aujp.bin) all available aldl software wont connect errors like: interface detected but no pcm connected or no pcm sync.But there is one bin that is different it is the AXXC 8D.bin. This bin connects but there are checksum errors and unrecognizable data,so whatever info i get is erratic. Now here is the confusing part my car runs on all of them but I do not know what is happening !! Please help me with this!!!!!!
I cannot connect to my ECM ALDL!! Let me explain, whenever i use any of the bins available from the (efi-tuning or efi-diy) sites or the stock bin (aujp.bin) all available aldl software wont connect errors like: interface detected but no pcm connected or no pcm sync.But there is one bin that is different it is the AXXC 8D.bin. This bin connects but there are checksum errors and unrecognizable data,so whatever info i get is erratic. Now here is the confusing part my car runs on all of them but I do not know what is happening !! Please help me with this!!!!!!
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Joined: Jan 2002
Posts: 1,162
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From: California
Car: Z28
Engine: L98
Transmission: T56
Could you post the following info?
I'm presuming you are using a '730 ECM...since AUJP and AXXC are both '730 cal's...AUJP by the way is an automatic calibration, AXXC is a 305 5spd calibration..
1) What software are you trying to use to read the ALDL port?
2) what cable do you have?
I'm presuming you are using a '730 ECM...since AUJP and AXXC are both '730 cal's...AUJP by the way is an automatic calibration, AXXC is a 305 5spd calibration..
1) What software are you trying to use to read the ALDL port?
2) what cable do you have?
Thread Starter
Junior Member
Joined: Dec 2003
Posts: 2
Likes: 0
Car: 1984 Firebird T/A
Engine: TPI 5.7L
Transmission: 5-Speed
I am using a Mastach interface and I have tried all aldl software . Oh! Yeah, I forgot to mention that my laptop does not have serial ports so I use a usb to serial adapter.
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From: Houston Area
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so I use a usb to serial adapter.
The USB adapter may be the issue. Try using someone elses laptop with a serial port to see if you can even connect. This would be a quick test to eliminate the problem.
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